<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录界面</title>
</head>
<body>
<h1>login01</h1>

<form method="POST">
    用户：<input type="text" name="username">
    密码：<input type="password" name="password">
    <input type="submit" value="提交">
    {{msg}}
</form>
</body>
</html>